I am building a LED array and am unsure of if I have been given bad information. I was told i can use a PC PSU to power my LED array safely using resistors and rheostats to dim them. After doing some research i have found out that LEDs need constant current more than constant voltage - a PC PSU is constant voltage.
The LEDs I purchased are all 10 watts each. I will be running 11 of them and would like to use one power supply if possible. The specs on the different LEDs and hardware are below:
4 x White Foreward voltage: 9-11v Foreward current: 900 - 1050 mA
4 x Blue Foreward voltage: 9-11v Foreward current: 900 - 1050 mA
1 x Violet Foreward voltage: 9.5-10v Foreward current: 900 - 1050 mA
1 x Green Foreward voltage: 9-12v Foreward current: 900 - 1000 mA
1 x Red Foreward voltage: 6-8v Foreward current: 900 mA
11 x 2 Ohm Resistor
4 x 1 Ohm rheostat
My plan was to power all of the LEDs on the 12v line, use a resistor for each LED and a rheostat for each color wired in series (blue and white use 1 rheostat). Red would use the 5v line and a resistor and rheostat.
My question is can i use a PC PSU? Is it a bad idea considering its not constant current? Would this setup work or would it burn up the LEDs? Would there be a better way to wire or drive this? If so what kind of a driver would i need?